Precision Timers

These devices NA555 are precision Timing circuits capable of producing accurate time delays or oscillation. In the timedelay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle CAN be controlled independently with two external resistors and a single external capacitor.NA555 The threshold and trigger levels normally are twothirds and onethird, respectively, of VCC. These levels CAN be altered by use of the controlvoltage terminal. When the trigger input falls below the trigger level, the flipflop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flipflop is reset and the output is low. The reset (RESET) input CAN override all other inputs and CAN be used to initiate a new Timing cycle. When RESET goes low, the flipflop is reset, and the output goes low. When the output is low, a lowimpedance path is provided between discharge (DISCH) and ground. The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5V supply, output levels are compatible with TTL inputs. By Texas Instruments
Part Manufacturer Description Datasheet Samples
NA555DR Texas Instruments Precision Timers 8-SOIC -40 to 105
NA555DRG4 Texas Instruments Precision Timers 8-SOIC -40 to 105
NA555DG4 Texas Instruments Precision Timers 8-SOIC -40 to 105
NA555D Texas Instruments Precision Timers 8-SOIC -40 to 105
NA555P Texas Instruments Precision Timers 8-PDIP -40 to 105
NA555PE4 Texas Instruments Precision Timers 8-PDIP -40 to 105
NA555 's PackagesNA555 's pdf datasheet
NA555D SOIC
NA555DG4 SOIC
NA555DR SOIC
NA555DRG4 SOIC
NA555P PDIP
NA555PE4 PDIP




NA555 Pinout, Pinouts
NA555 pinout,Pin out
This is one package pinout of NA555,If you need more pinouts please download NA555's pdf datasheet.

NA555 Application circuits
NA555 circuits
This is one application circuit of NA555,If you need more circuits,please download NA555's pdf datasheet.


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